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Our Edelbrock 52mm throttle body (part No. 3809) is more than enough to handle the added breathing of our Performer LT1 heads and cam. Too small a throttle body and flow would be impeded, too large and driveability could be an issue. Edelbrock offers a 58mm air valve, but the 52mm should be plenty for everything short of a stroker motor. View Related Article
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